Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, thien anh, thien danh
hieu manh » chieu xanh, hieu nganh, dieu hanh
nang sang » nang song, nong san
san thanh » ban thanh, van thanh, son thanh
thanh cac » hanh cac, thanh bac, thanh ca
qua dung » quang dung, su dung, qua song
cong san » cong tac

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu xanh) OR (hieu manh)) - nang sang ((qua dung) or (ung dung)) cong san thanh cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu xanh) OR (hieu manh)) - nang sang ((qua dung) OR (ung dung)) cong san thanh cac*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu xanh) OR (hieu manh)) - nang sang ((qua dung) or (ung dung)) cong san thanh cac*".